UI bug in site manager

OS:Windows Vista Ultimate + Aero
When adding or editing a site in site manager, upon pressing the Alt button (to use the shortcut key alt+a for example, the buttons+labels disappear).

Screenshot here:
http://img474.imageshack.us/img474/7892/uibugov9.jpg

Note the absence of buttons in the bottom

Thank you for your bug report!

I have resolved this issue for the next release.

If you'd like a test build please contact me via a private message.